In a few years' time，it will be possible to make things yourself with a 3dimensional 【1】 ．You download 3D designs（图案）online，then push “print”．Hours【2】 ，a real object will come out 【3】 your printer．All you need is a piece of plastic．
3D printers have been used in factories 【4】 about ten years．They are 【5】 to test part（部件）designs for cars and planes．They make objects out of liquid（液体）and plastic．
The printers are sold for about 15,000 dollars each．But in the next two years，prices are expected to fall 【6】around $5,000．Then they will 【7】 able to be used in offices and homes．
“In the future，everyone will have a printer 【8】this，”said Hod Lipson，a Cornell University professor．“You'll be able to print a toothbrush，a fork or a shoe．”
Schools can buy them for design（设计）classes．Doctors print models from CT scans to help in operations．
You will also be able to make toys．“It's easy to【9】a Barbie design，scan your head，【10】 the head on Barbie and print it out，” suggests Joe Shenberger，who works for a 3D printer company．